life isn't all beer and skittles
A full life is not just composed of simple pleasure, fun, and indulgence—there must also be toil and hardship. A: "What do you mean I have to get a job this summer? That is such crap!" B: "Sorry, kid. Life isn't all beer and skittles, and you've gotta start paying your own way." These trust-fund babies know nothing of having to work for a living. To them, life is all beer and skittles.
Life isn't all beer and skittles.
Prov. Life is not pleasurable all the time; you cannot always be having fun. (Skittles is a game like bowling.) I don't really mind going back to work when my vacation is over. Life isn't all beer and skittles, and I enjoy my fun that much more because I have work to compare it to. When George's parents stopped supporting him, George suddenly discovered that life isn't all beer and skittles.